67results about How to "High longitudinal tensile strength" patented technology

The invention relates to a method for preparation of a polyolefin microporous membrane by a wet process. According to the method, polyolefin resin, an antioxidant and liquid paraffin are adopted as raw materials for preparation of the microporous membrane through a thermally induced phase separation method. Employment of the preparation method provided in the invention can effectively prevent thermal oxidative degradation and carbonization phenomena in a high temperature processing process of polyolefin resin. The antioxidant and the polyolefin resin are mixed and dispersed more uniformly, and the antioxidant can be removed during liquid paraffin extraction, so that the pure and high performance polyolefin microporous membrane can be obtained.

The invention relates to a steel structure building beam or a steel structure pillar node interface, which is used for connecting convergent nodes of a steel structure building beam or a steel structure pillar and overcoming the shortages of toilsome assembly, bad accuracy, low connection strength, and the like in the existing connection mode. The steel structure building beam or pillar node interface is composed of joints of the end part of the beam or the pillar and joint seats converged on the node, wherein the joints lack a half at the end part in the horizontal direction to form a ladder shape. The shape and the size of the joint seats are the same with that of the joints. A connection insertion tenon is arranged on a mutual faying surface formed when the joint is butt jointed with the joint seat, the connection insertion tenon is vertical to the faying surface and a fastening structure for preventing the joint and the joint seat from horizontally separating is arranged at the faying position of the joint and the joint seat. According to invention, the steel structure building beam or pillar node interface has the beneficial effects that the faying mode bearing of the interface has large bearing capacity; the steel structure building beam-pillar node interface has high longitudinal tensile strength, is provided with the fastening member for preventing the joint and the joint seat from horizontally separating so that the connection of the node of the beam and the pillar has multi-directional higher anti-breaking strength, has a simple structure, and is convenient to manufacture and install; and with the adoption of the steel structure building beam or pillar node interface, the conditions are created for modularization, standardization and serialization of steel structure housing construction.

The invention provides copper alloy with excellent tensile strength and a copper alloy pipe prepared from the copper alloy. The copper alloy comprises 0.15 to 0.95 mass percent of Sn, 0.01 to 0.060 mass percent of P, 0.001 to 0.01 mass percent of B and the balance of copper and other impurities, wherein the impurity content is less than 0.06 mass percent. The longitudinal tensile strength sigmab of the annealed copper alloy pipe is more than or equal to 250 N/mm<2>, the radial average grain is less than or equal to 0.035 millimeter, and a yield ratio of the yield (limit) strength sigma 0.2 of a longitudinal tensile test to sigma b is less than or equal to 0.27. Compared with the copper alloy pipe made of phosphorus deoxidized copper, the tensile strength is improved, grains are refined, the yield strength is not changed obviously, and the corrosion resistance and heat resistance are excellent.

The invention relates to a single-point and double-point switching type BOPET thin film processing device and method, and belongs to the technical field of plastic thin film processing. The single-point and double-point switching type BOPET thin film processing device comprises a pre-heating unit, a stretching unit, a shaping unit, a transverse cutting unit and tension detection units, wherein the stretching unit is used for heating a base film to a stretching temperature and is composed of an air cylinder I, compression rollers I and pre-heating rollers; the temperature range of the pre-heating rollers is 70-140 DEG C; the stretching unit comprises four stretching rollers, a reflection plate and three infrared heaters; the single-point and double-point switching is realized by the matching of the stretching rollers, the reflection plate and the infrared heaters; the transverse cutting unit is arranged under the shaping unit; the tension detection units used for regulating and controlling tension in the stretching process are arranged under the transverse cutting unit. The single-point and double-point switching type BOPET thin film processing device and method are applied to the production of a BOPET thin film and have the advantages of high processing efficiency, complete functions and the like.

The invention relates to base paper of thin type packaging paper and a preparation method thereof and belongs to the technical field of the thin type packaging paper used by matching with a punching type carrying belt. The preparation method comprises the following steps: (1) mixing needle-leaf wood pulp with broad-leaf wood pulp, disintegrating, putting into a coarse pulp pool, diluting with water, then pulping, and carrying out defibering and devillicating-brooming treatment on pulp fiber till the beating degree is 35-45 degree SR and the wet weight is 8-12g; (2) adding a pulp dispersing agent, a water-resistant and moisture-proof agent and a wet-strength agent and mixing uniformly; and (3) diluting, putting onto a net, forming, then carrying out pressing, drying, winding, slitting and rewinding on the formed wet paper, and then packaging. The base paper is excellent in following coating, has higher longitudinal tensile strength and lower horizontal shrinkage rate, does not produce powder in slitting, and is not easy to generate fine folds and edge rolling.

The invention provides a quick-mounting type agricultural greenhouse composite structure. The composite structure comprises a fixed base plate, wherein the fixed base plate comprises multiple single plates; each bulged column plate integrated with the corresponding single plate is fixed at each of two ends of the upper surface of the corresponding single plate; a transverse plate is fixedly mounted in first limiting grooves through bolts II; a connecting rod is movably hinged in each second limiting groove through a hinge pin; each arched pipe is fixedly connected with a corresponding sleeve through a bolt III at the inner side end of the bottom surface of the sleeve. The fixed base plate is fixed on the ground through anchor rods, and the bearing capacity and the strength of the whole greenhouse can be greatly improved; the transverse plate is fixedly mounted in the first limiting grooves of first limiting blocks through the bolts II, the longitudinal tensile strength of a greenhouse support can be improved, and the wind resistance of the greenhouse support is improved; the arched pipes are fixed in the sleeves through the bolts III, the situation that the arched pipes shake enormously on strongly windy days can be eliminated, the structure is stable, convenient to mount and free of soldering, and the mounting speed is increased.

The invention discloses a cable with high strength, comprises a plurality of protective cylinders uniformly distributed along a straight line, Between any two adjacent protective cylinder is connectedby a buff mechanism, the outer surfaces of the plurality of protective cylinders are coated with a protective layer, the protective layer is made of elastic material, a plurality of connecting bodiesare uniformly and equally spaced and fixedly connected on the annular cylinder wall in the protective cylinder, A cable body is arranged between two connectors which are optionally located in the same plane and adjacent to each other, The cushioning mechanism comprises a first connecting block and a second connecting block, wherein the cross sections of the first connecting block and the second connecting block are annular, and the first connecting block and the second connecting block are fixedly connected between two adjacent protective cylinders, respectively, and the second connecting block is interposed in the first connecting block. The connecting mechanism and the buffer mechanism consume the pull force of the cable under the harsh environment, thereby improving the tensile strength of the cable as a whole and protecting the cable.

The invention discloses tipping paper containing hydroxyapatite with healthcare antibacterial effect. The tipping paper is prepared from, by weight, 50-65 parts of NBKP, 75-90 parts of bleached hardwood pulp, 10-15 parts of nano-kaolin, 10-15 parts of soluble starch, 2-4 parts of ,polyoxyethylene (60) sorbitan monostearate, 1-2 parts of N,N'-methylene bisacrylamide, 0.5-1 part of ammonium ceric nitrate, 6-12 parts of a Chinese herbal extract, 8-10 parts of rosin size, 20-40 parts of dimethyl sulfoxide, 2-5 parts of pearl powder, 3-5 parts of sodium dihydrogen phosphate, 5-9 parts of calcium nitrate, a proper amount of a 20% NaOH solution, a proper amount of distilled water, a proper amount of cyclohexane and a proper amount of ethyl acetate. Starch is used for wrapping radix glehniae and chrysanthemum morifolium ramat Chinese herbal medicine additives, the slow-release effect is achieved, and the effects that damage caused by smoking can be lower during smoking, and the cigarette smoking taste is improved can be achieved; due to the compound effect of hydroxyapatite and pearl powder, and the healthcare effects of enhancing immunity, supplementing calcium, achieving antisepsis and anti-inflammation and the like are achieved.

The invention discloses a bamboo composite pipe-steel pipe internal-external constraint concrete composite structure. The bamboo composite pipe-steel pipe internal-external constraint concrete composite structure is characterized in that the cross section of the bamboo composite pipe-steel pipe internal-external constraint concrete composite structure is sequentially composed of a bamboo composite pipe (1), sandwich concrete (2) and an inner steel pipe (3) from outside to inside; the bamboo composite pipe (1) sequentially comprises an isolating layer (11), a bamboo fiber strengthened composite layer (12) and an outer protective layer (13) from inside to outside; the bamboo fiber strengthened composite layer (12) is formed by continuously and evenly winding and solidifying one or more layers of bamboo fibers which are impregnated with resin adhesive on the outer wall of the isolating layer (11); the included angle between the fiber direction of the bamboo fibers and the circumferential direction of the bamboo composite pipe (1) ranges from minus 45 degrees to 45 degrees; the outer surface of the bamboo fiber strengthened composite layer (12) is coated with the outer protective layer (13); the inner steel pipe (3) is located in the cross section; the space between the bamboo composite pipe(1) and the inner steel pipe (3) is filled with the sandwich concrete (2); and the inner steel pipe (3) is internally hollow. The structure is high in bearing capacity, good in stiffness, ductility and shock resistance and has good construction performance and durability, the cross section inertia moment is large, concrete consumption is low, and construction cost is low; and the sustainable bamboo source in China is sufficiently utilized, and property advantages good toughness and high longitudinal tension strength of bamboo t are brought into play to the maximum extent.

The invention discloses high-glossiness tar-reduction tipping paper containing Chinese herbal medicine additives. The high-glossiness tar-reduction tipping paper is prepared from, by weight, 40-60 parts of bleached softwood pulp, 35-50 parts of bleached hardwood pulp, 20-30 parts of aloe, 15-30 parts of soybean protein, 13-17 parts of nano-kaolin, 14-18 parts of soluble starch, 2-4 parts of Tween 60, 1-2 parts of N,N'-methylene bisacrylamide, 0.5-1 part of ammonium ceric nitrate, 8-14 parts of a Chinese herbal medicine extracting solution, 8-10 parts of rosin gum, 25-40 parts of dimethyl sulfoxide, an appropriate amount of distilled water, an appropriate amount of cyclohexane and an appropriate amount of ethyl acetate. According to the high-glossiness tar-reduction tipping paper, the radix glehniae and Hangzhou white chrysanthemum Chinese herbal medicine additives are wrapped by starch, therefore, the slow releasing effect is achieved, and the effects of reducing smoking harm and improving the smoking taste of cigarettes are achieved when the cigarettes are smoked; in addition, the aloe and soybean protein have many good properties such as moisture absorption, breathability and bacterium resistance and can effectively decrease the smoking content of harmful substances such as tar in smoke.

The invention relates to a light aviation bearing rod piece. The light aviation bearing rod piece comprises two bearing members, two inner liners, a metal shaft sleeve and a tubular covering layer, wherein the two side surfaces of each bearing member are embedded into the two opposite inner liners respectively to form a round tubular pull rod structure; the bearing members and the inner liners are covered with the tubular covering layer; lug piece parts are arranged at the two ends of the bearing members respectively; drop-shaped through holes are formed in the lug piece parts; the metal shaft sleeve is arranged in the through holes; a plurality of annular longitudinal grooves are longitudinally formed in the outer surface of the metal shaft sleeve, and a plurality of transverse grooves which are distributed at equal intervals along the circumference of a round through hole are transversely designed. Compared with the prior art, the light aviation bearing rod piece has the advantages that the producing method is simple and convenient, the bearing capacity is high, and the like.

The present invention discloses a shear transmission belt. A shear connector connected with reinforcement curtain line is embedded in the belt, and integrates with belt material in vulcanization. The present invention can integrate the inside and outside of the transmission belt, transmit employing efficiently inside and outside of the transmission belt, eliminate slippage of inside and outside of the transmission belt to prolong the service life of the transmission belt, has no requirement of belt material and binder, and reduces product cost.

The invention provides a magnesium-aluminum alloy wire hemming type semi-conductive buffer water-blocking tape special for an ultrahigh-voltage cable of 110 KV or above, a semi-conductive water-blocking colloid and a method. The semi-conductive water-resistant colloid comprises ethylene glycol, butyl acrylate, methyl acrylate, conductive carbon black, a dispersing agent and water-absorbent resin. The water-blocking tape comprises fluffy body buffer cotton, coated tin-plated magnesium-aluminum alloy wires and water-blocking layers, the coated tin-plated magnesium-aluminum alloy wires are sewn on the fluffy body buffer cotton, and the water-blocking layers are arranged on the two sides of the fluffy body buffer cotton. According to the invention, the coated tin-plated magnesium-aluminum alloy wires are adopted, so that the semi-conductivity is obviously improved, and the volume resistance is obviously reduced. Besides, the longitudinal tensile strength is improved and reaches more than 110N/cm, which is more than 2.2 times of the tensile strength of the current like products, and the high-speed wrapping production efficiency is improved by more than 50%. The conductive adhesive prepared from ethylene glycol does not contain water, so that the surface of a conductor is not oxidized and corroded; under the same condition, the volatilization speed of alcohol is higher than that of water, so that the energy is saved and the consumption is reduced by more than 40%.

The invention relates to the field of aluminum alloy preparation, and discloses a preparation method of a directionally distributed prestressed carbon fiber reinforced aluminum matrix composite. The preparation method of the directionally distributed prestressed carbon fiber reinforced aluminum matrix composite comprises the following steps of (1) applying pretension to carbon fibers arranged in the same direction, and fixing with a mold to obtain directionally arranged carbon fibers; (2) pouring an aqueous solution of a surfactant into the mold, fully infiltrating, and drying to obtain the carbon fibers coated with the surfactant; and (3) pouring molten aluminum into the mold, carrying out ultrasonic oscillation, and then cooling to obtain the carbon fiber reinforced aluminum matrix composite. According to the preparation method provided by the invention, the carbon fibers are coated with the surfactant, so that the compatibility between the carbon fibers and an aluminum matrix can beeffectively improved, and the mechanical property and the heat-conducting property of the composite are improved.

The invention belongs to an overhead wire which takes two or more than two woven fibers as a wire carrying core, in particular to a woven fiber core overhead wire. Presently, the conventional fiber composite core wire adopts a single kind of high strength fiber, has the structure of a wire beam or a wire cable, is formed by soaking in epoxy resin and performing pultrusion and thermocuring forming, and has poor bending performance and impact resisting performance. The invention aims to provide the woven fiber core overhead wire. The woven fiber core overhead wire is characterized in that: a bar-shaped woven fiber core is formed by weaving two or more than two kinds of fibers two-dimensionally or three-dimensionally, and serves as the carrying core of the wire so as to enhance the longitudinal tensile strength of the wire and improve the lateral bending performance and the impact resisting performance of the wire. So, the defects of the conventional fiber composite core wire are overcome.

The invention discloses an electrodeless composite microporous membrane comprises the following raw materials in parts by mass: 120-160 parts of polypropylene, 1.5-2.6 parts of a nucleating agent, 7-11 parts of trimethylolpropyl trimethacrylate, 0.5-1.2 parts of styrene phenol polyoxyethylene ether ammonium sulfate, 5-8 parts of sodium trimethylsilanolate and 2-4 parts of magnesium ethoxide. The electrodeless composite microporous membrane for the polymer diaphragm provided by the invention has the advantages of continuous production, simple technological process operation, low energy consumption, no environmental pollution and the like, and the longitudinal tensile strength of the prepared electrodeless composite microporous membrane is not lower than 179.6 MPa and is at least 37.4% higher than that of the existing microporous membrane; the technical problem that a microporous membrane prepared in the prior art is poor in longitudinal tensile strength is solved.